1require "spec_helper"
 2
 3def fibonacci(n)
 4end
 5
 6def fibonacci_enumerator
 7end
 8
 9describe "fibonacci" do
10  it "should return the first n numbers in fibonacci" do
11    f = ->(x){ x < 2 ? x : f.call(x-1) + f.call(x-2) }
12    20.times do |n|
13      fibonacci(n).should == f.call(n)
14    end
15  end
16
17  it "can enumerate forever" do
18    results = fibonacci_enumerator.take(18)
19    f = ->(x){ x < 2 ? x : f.call(x-1) + f.call(x-2) }
20    18.times do |n|
21      results.should include(f.call(n))
22    end
23  end
24end
25